Catfish spawn in ponds?

I'm pretty sure i read somewhere that catfish rarely reproduce in farm ponds. Is this correct?.....i think it was on the ODNR website. If its true i gotta tell my buddy. He has a pond with some nice cats in it, we need them to stay, so might need to put more in?

You guys are great, thanks! I'm on the case. There have been 3 chanells over 30 inches pulled out of this pond. I caught a 3 pound and a four pound last weekend......of course i put them back....but no.......some other people keep them. I told him....no more of that crap.....keeeeepppppp them cats in there....lol.....thanks again. Of course....should a certain number of fish be pulled out to allow the 3 pounders to get bigger?